如何绕过亚马逊产品广告API请求最大化

我正在使用amazon API产品描述来获取数据库中特定商品的价格表。然而，在得到几千件商品后，我得到了：

System.ServiceModel.ServerTooBusyException was unhandled
  Message="The HTTP service located at https://webservices.amazon.com/onca/soap?Service=AWSECommerceService is too busy. "

看起来他们不希望用户用太多的请求来打扰他们。

我可能每天需要处理大约1000000个请求。

我想知道有没有办法超过这个限制？

以下是我请求数据的方式：

// prepare the first ItemSearchRequest
                // prepare a second ItemSearchRequest
                ItemSearchRequest request1 = new ItemSearchRequest();
                request1.SearchIndex = "All";
                request1.Keywords = table.Rows[i].ItemArray[0].ToString();
                request1.ItemPage = "1";
                request1.ResponseGroup = new string[] { "OfferSummary" };
                // batch the two requests together
                ItemSearch itemSearch = new ItemSearch();
                itemSearch.Request = new ItemSearchRequest[] { request1 };
                itemSearch.AWSAccessKeyId = accessKeyId;
                // issue the ItemSearch request
                ItemSearchResponse response = client.ItemSearch(itemSearch);